io.github.Antmanbuilds/ari-mcp
NPM · ARI-MCP · SCANNED SEP 21
Fair-price checks, leaderboards, and Ed25519 receipt verification for x402/MPP services.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security98
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 31 of 97 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency71
- Repository check failed: the declared repository URL returned HTTP 404. See how to fix → View diagnostics → Fail
- Cryptographically verified build provenance (signed, bound to Antmanbuilds/ARI). View diagnostics → Pass
- Clear OSI-approved license (Apache-2.0).Pass
- Actively maintained (last published 118 days ago).Pass
- Security-disclosure policy not yet verified: we couldn't inspect the source repository.Unverified
Schema Quality & AI Usability71
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 996 tokens (~90/item across 11 items; 11 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management97
- Stability observed for 29 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage68
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 3% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 11 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 12 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the io.github.Antmanbuilds/ari-mcp server?
io.github.Antmanbuilds/ari-mcp runs locally as an npm package, launched with npx -y ari-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · ari-mcp
claude mcp add antmanbuilds-ari-mcp -- npx -y ari-mcp
{
"mcpServers": {
"antmanbuilds-ari-mcp": {
"command": "npx",
"args": [
"-y",
"ari-mcp"
]
}
}
} {
"servers": {
"antmanbuilds-ari-mcp": {
"command": "npx",
"args": [
"-y",
"ari-mcp"
]
}
}
} codex mcp add antmanbuilds-ari-mcp -- npx -y ari-mcp
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"antmanbuilds-ari-mcp": {
"type": "local",
"command": [
"npx",
"-y",
"ari-mcp"
],
"enabled": true
}
}
} openclaw mcp add antmanbuilds-ari-mcp --command npx --arg -y --arg ari-mcp
mcp_servers:
antmanbuilds-ari-mcp:
command: "npx"
args: ["-y", "ari-mcp"] {
"McpServers": {
"antmanbuilds-ari-mcp": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"ari-mcp"
]
}
}
} assistant mcp add antmanbuilds-ari-mcp -t stdio -c npx -a -y ari-mcp
{
"mcpServers": {
"antmanbuilds-ari-mcp": {
"command": "npx",
"args": [
"-y",
"ari-mcp"
]
}
}
} Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 20 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.
- 18 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.
- 16 Sept 26 −3
- Stability: pass → 0.80 functional
- 15 Sept 26 +1
- Stability: 0.97 → pass security
- 13 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.
- 11 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.
- 9 Sept 26 −3
- Stability: pass → 0.80 functional
- 8 Sept 26 +1
- Stability: 0.97 → pass security
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 21 Sept 2026 · Analysed npm/ari-mcp@0.1.3
Provenance Verified
A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.
| Result | Verified |
|---|---|
| Ecosystem | npm |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | Antmanbuilds/ARI |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/Antmanbuilds/ARI/.github/workflows/release.yml@refs/tags/v0.1.3 |
| Rekor log index | 1593367087 |
| Predicate type | https://slsa.dev/provenance/v1 |
| Subject digest | sha512:f8344063219b31e270ec75178f7f9e23f1d7fa7a10d64966494d0c760d1c049ff68989dd531e7416ede45b6c63df479fe055dcbdd7b54b6aadc0fad28 |
Background: How many MCP packages publish verified provenance →
Dependencies 97 packages
| Packages resolved | 97 |
|---|---|
| Stale | 31 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
get_fmv Get the fair-market value for a service ~51
Look up the current FMV (median + low/high band) for an indexed service. Use this when you need the price you'd quote a counterparty before knowing their ask.
| Name | Type | Req | Description |
|---|---|---|---|
| slug | string | yes | – |
No output schema declared.
No examples provided.
get_leaderboard Get a leaderboard slice ~63
Return the top services for one of the canonical leaderboards: cheapest, most_expensive, most_volatile, biggest_drop, biggest_jump, most_observed.
| Name | Type | Req | Description |
|---|---|---|---|
| category | string | – | – |
| kind | string | yes | – |
| limit | integer | – | – |
No output schema declared.
No examples provided.
get_service Get full service detail ~44
Return the full detail row for one service: slug, name, vendor, protocol, category, units, fair price, sources, related services.
| Name | Type | Req | Description |
|---|---|---|---|
| slug | string | yes | – |
No output schema declared.
No examples provided.
get_signed_receipt Re-fetch a previous signed receipt body ~49
Look up the canonical signed body for a previously-issued receipt id, so an agent can show the exact bytes it relied on when making a payment decision.
| Name | Type | Req | Description |
|---|---|---|---|
| for_request_id | string | yes | – |
No output schema declared.
No examples provided.
is_fair_price Check if a quoted price is fair ~86
Compare a quoted price for a known service against ARI's current fair-market value (FMV) band. Returns a verdict (green/amber/red), the FMV, the band, the percentile, the sample size, and a citable signed receipt id.
| Name | Type | Req | Description |
|---|---|---|---|
| amount_usd | number | yes | – |
| slug | string | yes | – |
| unit | string | – | – |
No output schema declared.
No examples provided.
list_services List indexed services ~93
Browse the ARI service index. Filter by protocol (`x402`, `mpp`), category, or free-text search. Returns paginated rows with slug, name, vendor, protocol, category, FMV, and last-observed-at.
| Name | Type | Req | Description |
|---|---|---|---|
| category | string | – | – |
| limit | integer | – | – |
| offset | integer | – | – |
| protocol | string | – | – |
| search | string | – | – |
No output schema declared.
No examples provided.
prepay_verdict Universal pre-payment fairness check ~232
The Universal Fairness Skill entry point. Wraps any agent wallet (Coinbase Agentic Wallet, AgentCash, ATXP, 1Pay.ing, …) with a refuse-to-overpay safety check. Call BEFORE settling any HTTP 402 / x402 / MPP quote. Pass the target URL (or service slug), the quoted amount in micros, the currency (default USD), and the chain (default off-chain). Returns `{ verdict: 'fair' | 'stretched' | 'overpriced' | 'unknown', reason, suggestedMax, evidenceUrl }`. Refuse to settle on `overpriced`; surface the warning and ask consent on `stretched`; settle on `fair`.
| Name | Type | Req | Description |
|---|---|---|---|
| amountMicros | number | – | – |
| amount_micros | number | – | – |
| chain | string | – | – |
| currency | string | – | – |
| service | string | – | – |
| unit | string | – | – |
| url | string | yes | The full URL the agent is about to POST/GET against, OR the indexed ARI service slug. The server resolves slug or hostname. |
No output schema declared.
No examples provided.
recent_observations Recent observations for a service ~68
Return the most recent price observations for one service, oldest-newest by `observedAt`. Useful when an agent wants to spot intraday trends or audit the inputs to FMV.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | – |
| since | string | – | – |
| slug | string | yes | – |
No output schema declared.
No examples provided.
refuse_if_overpriced Decide whether to pay a quote ~77
Convenience wrapper agents call right before paying. Returns `should_pay: false` (with a reason and savings estimate) when the quoted amount is materially above ARI's high band; `should_pay: true` otherwise.
| Name | Type | Req | Description |
|---|---|---|---|
| amount_usd | number | yes | – |
| slug | string | yes | – |
| unit | string | – | – |
No output schema declared.
No examples provided.
subscribe_alert Subscribe to a price alert ~92
Set up a price alert. Pass a webhook URL OR an email. Conditions: `above`, `below`, or `volatility_pct` with a numeric threshold (USD or %). Proxies the existing /api/v1/alerts endpoint.
| Name | Type | Req | Description |
|---|---|---|---|
| condition | string | yes | – |
| string | – | – | |
| slug | string | yes | – |
| threshold | number | yes | – |
| webhook | string | – | – |
No output schema declared.
No examples provided.
verify_receipt Verify a previously-issued ARI receipt ~65
Re-fetch a receipt by its ULID and re-verify the Ed25519 signature. Use to audit a counterparty's claim, e.g. 'I refused this payment because ARI Receipt 01HZ… said it was overpriced'.
| Name | Type | Req | Description |
|---|---|---|---|
| receipt_id | string | yes | – |
No output schema declared.
No examples provided.
What is the io.github.Antmanbuilds/ari-mcp server?
io.github.Antmanbuilds/ari-mcp is listed in the public MCP registry as io.github.Antmanbuilds/ari-mcp. Fair-price checks, leaderboards, and Ed25519 receipt verification for x402/MPP services. This page covers its npm package (ari-mcp).
Is the io.github.Antmanbuilds/ari-mcp server safe to use?
io.github.Antmanbuilds/ari-mcp scores 85 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 21 September 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the io.github.Antmanbuilds/ari-mcp server expose?
io.github.Antmanbuilds/ari-mcp exposes 11 tools: is_fair_price, get_fmv, list_services, get_service, get_leaderboard, and 6 more. Their descriptions and schemas cost roughly 920 tokens of context every time the server is loaded.
Is the io.github.Antmanbuilds/ari-mcp server still maintained?
io.github.Antmanbuilds/ari-mcp is still listed as active in the MCP registry. We last reached this channel on 21 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the io.github.Antmanbuilds/ari-mcp server under?
io.github.Antmanbuilds/ari-mcp declares the Apache-2.0 licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.